Efficient charge transfer using a switched capacitor resistor

Details Efficient charge transfer using a switched capacitor resistor Efficient charge transfer using a switched capacitor resistor

2006-02-28

2006-02-28

Urban, Edward F. (Department: 2685)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

C455S313000, C455S324000, C323S281000

Reexamination Certificate

active

07006813

ABSTRACT:
The application of a non-zero voltage offset to rotating capacitors1111and1112permit the use of a single positive voltage supply. However, the precharging of the rotating capacitors1111and1112is power inefficient. A power efficient and low-noise precharging operation is realized through the sharing of the charge on a feedback capacitor1075and1080that is significantly larger than the rotating capacitors1111.Once a precharging operation is complete, the charge on the feedback capacitor1075and1080is refreshed from its residual charge level (rather than zero charge level) to a desired charge level.

REFERENCES:
patent: 5969513 (1999-10-01), Clark
patent: 6094037 (2000-07-01), Pricer
patent: 2003/0080889 (2003-05-01), Muhammad et al.
patent: 2003/0083033 (2003-05-01), Staszewski et al.
patent: 2003/0083035 (2003-05-01), Staszewski et al.
patent: 2003/0119472 (2003-06-01), Das

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